<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
        "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <title>Title</title>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
</head>
<body>
    <center>
        <br><br>
        添加用户:<br><br>
        姓名: <input type="text" name="name" id="name" />&nbsp;&nbsp;
        email: <input type="text" name="email" id="email" />&nbsp;&nbsp;
        电话: <input type="text" name="tel" id="tel" /><br><br>
        <button id="addUser">提交</button>
        <button id="deleteUser">删除</button>
        <br><br>
        <hr>
        <br><br>
        <table id="usertable" border="1" cellpadding="5" cellspacing=0>
            <tbody>
            <tr>
                <th><input type="checkbox" id="allCheckbox"/></th>
                <th>姓名</th>
                <th>email</th>
                <th>电话</th>
                <th>删除</th>
                <th>修改</th>
            </tr>
            </tbody>
        </table>
        <br>
        <br>
        <br>
        <hr>
        修改用户:<br><br>
        姓名: <input type="text" name="name" id="name_update" />&nbsp;&nbsp;
        email: <input type="text" name="email" id="email_update" />&nbsp;&nbsp;
        电话: <input type="text" name="tel" id="tel_update" /><br><br>
        <input type="hidden" id="id_update"/>
        <button id="updateUser">提交</button>
    </center>
</body>
</html>